Punching-machine and stripper therefor



(No Modei.)

P. SOTTER.

PUNGHING MACHINE AND STRIPPER THEREFOR.

No. 528,039. Patented Oct. 28, 1894.

U TTE STATES PATENT nron.

PUNCHING-MACHINE AND STRIPPER THEREFOR.

SPECIFICATION forming part of Letters Patent No. 528,039, dated. October23, 1894. Application filed June 22,1894. Serial No. 515,528. (Nomodel.)

To all whom it may concern:

Be it known that I, FREDERICK SoTTER, a citizen of the United States,residing at Ooatesville, in the county of Chester, State ofPennsylvania, have invented a new and useful Improvement inPunching-Machines and StrippersTherefor, which improvement is fully setforth in the following specification and accompanying drawings.

My invention relates to improvements in punching machines, and consistsof strippers therefor, which are so disposed that the punch whenelevated is not obscured, and which are also adapted to be readilyapplied to existing punches, the novel features of which will behereinafter set forth.

Figure 1 represents a front elevation of a stripper for a punchingmachine, embodying my invention. Fig. 2 represents a side elevation ofthe same.

Similar letters of reference indicate corresponding parts in the twofigures.

Referring to the drawings: A designates the cross head; B, a chuck orholder for the punch C, which is suitably secured therein, and Ddesignates a bed or anvil, the above parts being of ordinaryconstruction, and forming no part of my invention.

E designates the frame of the punching machine. The cross head A and thepunch O are reciprocated by suitable mechanism intermediate of the sameand the shaft F. The said shaft F is provided with a suitable hearingand has attached thereto the disk G, which has on its face the cam orcam groove H, the contour of which is shown in dotted lines in Fig. 1,the depth being shown in Fig. 2. J designates a cross bar, in the centerof which is secured a stud K provided with a roller L, which latter isengaged by the said cam H, which gives a vertical movement to thestripping rods equal to the stroke of the punch.

Through each end of the cross bar J passes a vertical rod M, the lowerextremity of each after passing through the cross head A being bentrearwardly at N, and downwardly at P, so that the operation of the punchwill not be obscured. The lower ends of the stripping rods or holdersmay be provided with. feet if desired, as shown in dotted lines, whendoing certain classes of work, as when the machine is used for punchingflue-holes, &c. The ver tical rods M are held in position relative tothe cross head J by the nuts Q.

R designates guides for the strippers, which in the present instance arefour in number, and are attached to the front of the frame.

The disk G is provided with the eye S, in which a bar may be insertedfor moving said disk by hand, whenthe punch gets stuck, or stops onadead center, or for. any other reason.

, The operation will now be apparent: When the punch is in its extremeup-stroke, the positions of the parts areas shown. The stripper barsstart downward with the punch, and reach the bottom of the stroke at thesame time, but the relation of the inside cam to the actuating mechanismof the punch is such that the-punch makes a portion of its upward strokesufficient to clear the plate, while the stripper rods remain stationarybearing against the same, whereupon the stripper rods by a quick motion,rise and reach the top of their stroke simultaneously with the punch, atwhich point they are always above the latter as shown, so that the viewof the punch is not obstructed, and when the said punch is down, thehands of the operator are not liable to be caught by the stripper rods,since the latter are bent rearwardly and. contact with the plate whichis being punched, at a pointbehind the punch, so that a view of thelatter from the front or either side is always unobstructed, when thepunch is down as Well as when it is up.

The above apparatus can be quickly and readily attached to or removedfrom an ordinary punching machine, as is evident.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A stripper for punching machines comprising two vertical rods havingfeet bent into 9 5 clears the plate in its upward stroke before thestripper bars are removed from contact therewith, substantially asdescribed. 1

2. The stripper rods M having their lower extremities bent rearwardly asshown, and guides therefor, a cross bar J, means for securing said crossbar to the rods and a stud .K engaging the cam H of the disk G, thelatter being mounted on the punch actuating shaft, and the above partsbeing combined substantially as described.

3. A frame, a reciprocating cross head with a punch guided on saidframe, stripping rods having ends adjacent said punch, a cross head towhich said rods are adjustably secured, a shaft with a cam reciprocatingsaid latter mentioned cross head, the movements of said cross headsbeing independent, and the above parts being combined substantially asdescribed.

4. In a punching machine, a punch, a stripper, adapted to be actuated byconnections from the punch mechanism, said stripper having its lowerextremities bent rearwardly and downwardly whereby the view of the punchat any point of its stroke, from the front or either side, is at alltimes unobstructed, substantially as described.

5. In a punching machine, a punch, a cam adapted to be actuated byconnections from the punch mechanism, stripper rods actuated by said camand having their legs set back, said cam disk having an eye in itsperiphery for the insertion of a bar, whereby the machine can be movedby hand when desired, the above parts being combined substantially asdescribed.

6. A frame, a reciprocating cross head guided in said frame, andcarrying a punch, stripping rods having guides on said frame, said rodsbeing adjustably secured to a cross head, a rotatable cam engaging saidlast mentioned cross head, said rods having their ends adjacent to saidpunch, and said cross heads being actuated by independent mechanism.-ubstantially as described.

FREDERICK SOTTER.

Witnesses:

JOHN A. WIEDERSHEIM, R. H. GRAEsER.

